I add button to Hospital Floor sample and want to change fill color in one bed. On click event I have these code

var vm = (HospitalFloorPlanViewModel)DataContext;

IEnumerable<TestFloor.ViewModels.MapElementViewModel> mevm =  vm.MapElements;

HospitalFloorPlanViewModel hfvm = new HospitalFloorPlanViewModel();

hfvm.ChangeColor(mevm);

Here is ChangeColor function in HospitalFloorPlanViewModel class

public void ChangeColor(IEnumerable<MapElementViewModel> ele)
{
 var t = ele.FirstOrDefault(x => x.Name == "0");

 t.Fill = new SolidColorBrush(Colors.Red);
}

The problem is bed color not refreshing unless I Check/uncheck one of the filter checks (bed Status filter). I tried to use bedLayer.ImportAsync();, but it's not working for me. How can I refresh one map element?

Thanks